Abstract:
Cement stabilized crushed stone has become an indispensable material in the road structure. But the cement stabilized crushed stone has some serious defects. Cement based materials are very sensitive to the temperature and have relatively weak flexural performance, which can cause reflection cracks, and which will drastically shorten the life of the pavement. Widespread research has focused on this problem. Vibration mixing was used to place the cement concrete, as this can improve the anti-cracking ability, compressive strength and temperature/drying shrinkage performance by improving the homogeneity of the cement. In this paper, vibration mixing method was compared with normal mixing. Different cement contents (2%, 3%, 4%, 5%) were tested to determine how vibration affects the mechanical performance and temperature/drying shrinkage performance of the cement stabilized crushed stone. Results show that vibration mixing method can remarkably increase the compressive strength and reduce the temperature shrinkage which in turn can reduce the cement content and prevent the cracks in the cement stabilized crushed stone.
Description:
Papers presented at the 36th Southern African Transport Conference, CSIR International Convention Centre, Pretoria, South Africa on 10-13 July 2017.
